Hose fitting for fluid pressure systems



OC- 10, 19334 M. LoUGHr-:AD

HOSE FITTING' FOR FLUID PRESSURE SYSTEMS Filed Feb. 6, 1928 Mw, @MWA 'Patented oet. 1c, 1933 1,929,75

1,929,750 y '.LJSE FITTING FOR FLUID PRESSURE l SYSTEMS Malcolm Loughead, Detroit, Mich., assigner to Hydraulic Brake Company, Los Angeles, Calif., a corporation of California Application February 6, 1928. Serial No. 252,068

3 Claims. (Cl. 285-84) l My invention relates vto improvements in hoseA -sleeve is slightly enlarged as shown at 8 so tting for fluid pressure systems. as to assist in the initial introduction of the hose The inventionwill be explained as embodied in B within ,the sleeve. y that type of hose connection usedin hydraulic In assembling the tting upon.the hose, sleeve 5 brake systems, such as fully disclosed and de- A is held stationary and the end of hose B is 60 scribed in my prior Patent No. 1,531,798, issued inserted in the enlargement 8 of the sleeve. The March 31, 1925. hose is then turned so as to cause the helical rib- An object of the invention is to provide an hing 7 to engage with the outer wall of the hose improved hose ntting for fluid pressure systems. and assist in the insertion of the hose B within A further object is to provide a hose fitting Athe sleeve. As the hose is thus wrung into the 65 having relatively few parts and which may be sleeve it is compressed slightly causing the bore assembled easily. to become slightly restricted.

A further object is to provide a hose fitting When the end of the hose B lies substantially which engages with the hose substantially at the outer end of the sleeve the metal washer l5 throughout the entire length of the tting, there- D is pressed against the end of the hose and nip- 70 by allowing the use of a iitting shorter than the ple C is inserted within the bore 9 of the hose. present type of hose fitting Without the sacrifice At this time the tubular portion 10 of the nipple of adequate engagement with the hose. is somewhat smaller than the normal inside di- A further object is to provide a hose fitting ameter 0f bore 9- The radially flanged portion which is relatively cheap to manufacture. 11 of the nipple lies fiat-against the outer end 75 Other objects and advantages will be'v more 12 0f Sleeve A and againstl Washer D. particularly pointed out in the following speci- A plunger iS then inserted Within tubular p0rfication and appended claims. K tion 10 of nipple C causing the nipple to expand,

` An embodiment of the invention is illustrated and assume the position shown in Figure 3. The in the accompanying drawing forming a part tubular portion is expanded suciently to cause 80 of this application, in which .f l the internal diameter of tubular portion 10 to co- Figure 1 is a side elevation of` a h'ose with incide with the normal internal diameter of the the fitting attached; bore 9 of the hose.

Figure 2 is an enlarged end` elevationlv pf theI n- 'Order t0 more fully insure against the Workparts illustrated in Figure 1; ing/.out of nipple C from within the bore 9 of the S5 Figure 3 is an enlarged sectional view valong hose; a slight bead 15 is PrOVided in the inner the line 3 3 of Figure 2; and f most end of the tubular portion 10. s Figure i is a sectional view of the outer sleeve One of the outstanding advantages of a hose 0f the fitting. V coupling of this sort Where a substantially non- In general, my improved hose fitting consists expansible hoseI is employed, is that the hose at 90 in an externally threaded outer sleeve A, adapted n0 time during the application 0f the fltting 0I to receive therein a substantiallynon-expansible es a result 0f the ultimate attachment 0f the fabric and rubber hose B, the external diameter fitting thereto. iS eXDanded t0 its elastic limit. of hose B being snghuy greater than the internal The outer portions of the hose are actually coneo diameter of the sleeve A, ,en expensible nipple traoted and remain so. the onlyv portion of the 95 i C inserted within the bore of the hose B, and hose which is expaded beine that slight portion e. washer D interposed between the end of the surrounding the tubular part 10 of the nipple. hose B and the adjacent face of the nipple. By rst decreasing the Outer diameter of the sleeve A is provided at its inner end with a, hose as occurs when the hose is Wrung into the radial flange 5 having the peripheral contour of Sleeve. the diameter 01 the fabric covering form- 100 a, hex nut by means of which the fitting may be ing the outermost part of the hose is decreased. gripped with a wrench or the like and turned. When, therefore. the nipple is'expanded within. External threads 6 are cut in the outer wall of the bore the hose material is highly compressed the sleeve to be received in internally threaded between the nipple and the sleeve but there is no connecting members forming a part of the fluid; increase in the diameter of the fabric covering 105 system in which the hose with its fittings is to which is inherentlysubstantially non-elastic. `be used. When the hose is employed in a high pressure With reference to Figure 4, the inner wall of uid system it is impossible therefore to burst the sleeve` 5 is provided with helical ribbing '7 the fabric covering as is true in the cse where the and the extreme inner end of the bore of the fabric covering is' slightly expanded as where In@ a sleeve is employed of the same or greater diameter than the external diameter of the hose. In the assembly of the fitting upon the hose, the contracting of the hose within the'sleeve is greatly facilitated by the helical ribbing 7 so that very few turns of the hose are necessary to fully engage the hose withl the sleeve prior to the introduction of the nipple.

The purpose and utility of the washer D is to prevent malformation of the flange 11 of the nipple during the expansion of the tubular portion 10 which might occur by virtue of the slight resiliency of the material of which the hose is constructed.

I claim:

1. A hose fitting for a iuid pressure hose comprising an externally threaded sleeve formed with helical ribbing on the inner wall thereof forl urging a hose therethrough when turned therein, a nipple having an expansible tubular portion adapted to be received within the bore of the hose when the hose is disposed within the sleeve and expanded therein, said nipple havinga' anged portion abutting one end'of the sleeve and a washer interposed between the flanged portion of the nipple and the end of the hose.

2. The combination with a substantially nonexpansiblehose of a hose fitting therefor comprising an externally threaded sleeve, helical ribbing formed on the inner wall of said sleeve and extending throughout substantially the entire length of the sleeve, the internal diameter of said sleeve being slightly less than the diameter of said hose, a nipple having an expansible tubular part adapted to be received Within the bore of said hose and having a flanged portion adapted to abut one end of the sleeve and a washer encompassing the tubular part of the nipple and lying between the flanged portion of the nipple and the adjacent end of the hose.

3. The combination of a substantially non-ex pansible hose, of a hose tting 'therefor comprising a sleeve for encompassing the end of the hose, the internal diameter of the sleeve being less than the external diameter of the hose, a nipple having an expansible part adapted for disposition,

Within the bore of the hose and therein ex- Y panded to compress the hose between'the sleeve and the nipple, and a rigid washer encompassing the expansible part of the nipple and abutting the end of the hose.

MALCOLM LOUGHEAD. 

